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Myocardial Infarction

Figure 9.2 illustrates the following three ECG hallmarks of a classic STEMI These three changes in the ECG typically evolve over a period of minutes to hours, with ST elevation usually appearing first, followed variably by T wave inversion and Q wave formation. Subsequently, the changes may show slow resolution, usually over a period ranging from days to months. Q waves, however, may persist indefinitely, producing ECG evidence of a scar. Figure 9.2. The three ECG hallmarks of AMI, including ST...